linux-kernel - [PATCH v1 0/7] Minor Raid5 Fixes and Cleanup

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Date:   Thu,  7 Apr 2022 10:57:06 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        Song Liu <song@...nel.org>
Cc:     Guoqing Jiang <guoqing.jiang@...ux.dev>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH v1 0/7] Minor Raid5 Fixes and Cleanup

Hi,

This series contains a few cleanup and minor fixes to the raid5 code
to make it a bit easier to hack on.

Patch 1 cleans up the error returns in setup_conf() (I had an
abandonded patch that added another error out and needed this clean
more sensible).

Patch 2 fixes a sparse warning with the raid5_percpu structure.

Patch 3 through 6 fixes sparse warnings related to missing __rcu
annotations when using the RCU calls.

Patch 7 just adds some basic __must_hold annotations for the device_lock
to any function that is called while holding the lock. Sparse doesn't
really check this, but the annotation makes the locks a little easier
to analyze.

Thanks,

Logan

--

Logan Gunthorpe (7):
  md/raid5: Cleanup setup_conf() error returns
  md/raid5: Un-nest struct raid5_percpu definition
  md/raid5: Add __rcu annotation to struct disk_info
  md/raid5: Annotate rdev/replacement accesses when nr_pending is
    elevated
  md/raid5: Annotate rdev/replacement access when mddev_lock is held
  md/raid5-ppl: Annotate with rcu_dereference_protected()
  md/raid5: Annotate functions that hold device_lock with __must_hold

 drivers/md/raid5-ppl.c |  13 ++-
 drivers/md/raid5.c     | 179 ++++++++++++++++++++++++++---------------
 drivers/md/raid5.h     |  23 +++---
 3 files changed, 139 insertions(+), 76 deletions(-)

base-commit: 3123109284176b1532874591f7c81f3837bbdc17
--
2.30.2